Anthropogenic platinum,palladium and rhodium concentrations in road dusts from Hyderabad city,India |
| |
Authors: | Ramavati Mathur V Balaram M Satyanarayanan S S Sawant S L Ramesh |
| |
Institution: | (1) National Geophysical Research Institute (Council of Scientific and Industrial Research), Uppal Road, Post Bag No. 724, Hyderabad, 500606, India |
| |
Abstract: | This paper presents the first study of accessing the Pt, Pd and Rh levels in road dusts collected from Hyderabad city, India,
as these metals, emitted from automobile catalytic converters, are accumulating in the environment causing concern about human
health and ecological risks. Samples were analyzed by ICP-MS following preconcentration by NiS-fire assay and Te coprecipitation.
Pt (1.5–43 ng/g), Pd (1.2–58 ng/g) and Rh (0.2–14.2 ng/g) concentrations obtained were above upper crust values, but were
lower when compared with several other cities around the world. Dust samples from road junctions and traffic signals with
heavy and erratic traffic flow showed higher PGE levels than those from roads with low and free flow traffic suggesting that
traffic flow conditions greatly influenced emission of PGE from the catalyst. Significant correlation of Pt, Pd and Rh indicate
a common source for these metals. PGE were also positively correlated with Ce, Zr, Hf and Y. These positive inter-element
correlations identified traffic as the main source of PGE emission to the roadway environment. The results obtained indicate
to an appreciable increase in auto catalyst-derived PGE. In consideration of the adverse effects of PGE, monitoring their
level and transformation paths is of prime importance. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|